Ring forming mechanism



RING FORMING MEGHAN SM Filed sept. 13, 1957 \4 sheets-sheet 1 A TORNEI/S,

Jan. 31, 1939. s, G. SMH 2g-Mmm RING FORMING MECHANISM Filed Sepi. 13, 1937 4 Sheets-Sheet 2 BY [I2 A TTORNE Ys Jim., 3l, i939. s, G. SMITH RING FORMING MECHANISM 4 SheebS-Sheei 3 Filed Sept. 13, 1937 /N VENTO/e d/lry 6.7 57772215. BY

S. G. SMITH JM. m, w39.

RING FORMING MECHANI SM MEAM Filed Sept. 15, 1937 4 Sheets-Sheet 4 A TTORNEY Patented 31, 1939 RING IFRG lil il I fil stanley u. smith, muon, mein., @suor is 'rae Murray Corporation or America, troit, ch., a corporation oi Delaware Application September i3, 193'?, @erlitt No. 163,630

ll Claims.

My invention relates to a method and means for forming and applying wire rings and particularly to a device and method for feeding wire to an anvil where it is cut, formed by jaws which clinch the element about members to be secured.

It is recognized that apparatus has been employed heretofore for cutting and forming wire and for applying the wire to elements which are to be held together. The device embodying the in present invention comprises an improved method for forming clinching elements, known in the art as hog rings and clinching the rings about wires or other members which are to be secured together. The device is compact in form and extremely portable and is intended for suspension over the members which are to be se cured together and operated as a clinching device. During the clinching of one hog ring, the device operates to sever a length of wire o retrieved from clamping the prior ring.

The device embodies in general, a hydraulic cylinder which operates a piston to move a slide downwardly on which a pair ci arms are pivotally swung. The arms bend a length of wire previously cut and delivered to an anvil about the anvil by a further movement of the arms. The

"hog ring thus formed is carried by the arms to the members which are to be joined together. The further movementoi the arms produces .a clinching oi the hog ring and the severance oi another length of wire is delivered to the anvil upon, the retraction ci 'the arms and slide by the piston. During the retrieving of the piston, an- 5 other length oi wire is ied into the cutting dies in position to be operated on by the dies when the device is again operated. accordingly, the main objects of my invention are; to provide a portable device for forming hog rings and for clinching said rings about members which are to be joined together; to provide a hog ring forming device' with cutting dies and an anvil for cutting and forming hog rings and with clinching jaws for clinching the rings so formed; to provide a clinching device with means for forming a hog ring during the time another length of wire is cut; to automatically feed a length of wire to the cutting dies of the device upon the retractive movement of the forming elements; to lprovide a ring forming device which ls actuated through the move- 'ment of a trigger to cut a length of wire to form a ring therefrom and to clinch a ring about members; and in general to provide a portable ring forming and clinching device which is simple in which is delivered to an anvil when the jaws are (oi. irosn construction, positive in operation, and economical of manufacture.

Other objects and features of novelty of my invention will be specifically pointed out or will become apparent when referring for a better understanding of my invention to the following description taken in conjunction with the accompanying drawings. wherein:

Figure 1 is a. view in side elevation of a ring forming and cllnching device embodying features of my invention;

Fig. 2 is a front broken view of the structure illustrated in Fig. l, as viewed on the line l--i thereof;

Fig. 3 is a top plan view of the structure illustrated in Fig. l.;

Fig. -l is a rear view of the structure illustrated in Fig. 2;

Fig. 5 is a sectional view of the structure illustrated in Fig. 2. talren on the line li--t thereof;

Fig. 6 is an enlarged sectional view of the structure illustrated in Fig. l, taken on the line t-ll thereof;

Fig. 'i is a sectional view of the structure illustrated in Fig. 6, taken on the line 'l-l thereof;

Fig. 8 is an enlarged sectional view of the structure illustrated in Fig. l, teiten on the line ill-u ther-eci;

Fig. 9 is an enlarged sectional View of the structure illustrated in Fig. lll, taken on the line il--il thereoi;

Fig. lil is an enlarged broken view oi the structure illustrated in Fig. l, with the piston in retracted position; I

Fig. li is an enlarged broken sectional view of the structure illustrated in Fig. lll, taken ou the line l l--li thereof;

lil is a view oi the structure illustrated in Fig. il with the anvil in partially retracted position;

Fig. i3 is a view oi the structure illustrated in Fig. il with the anvil in completely retracted position;

Fig. 1li is an enlarged view in elevation of' a ring formed by the device illustrated in the foregoing gures;

Fig. l5 is a view oi a pair of wires joined by the rings illustrated in Fig. 14 by the clinehing elements of the device illustrated in Fig. 1; and

Fig. 16 is an enlarged sectional view of the structure illustrated in Fig. 15 taken on the line lt--lt thereof. l

The device illustrated in Fig. 1 is shown with the piston near the end of its stroke having a "hog ring in a position to engage members.

which are to be secured together when the ring tion. A roller 63 guides the rod 62 and is is clamped thereabout during the remaining pormounted on an eccentric shaft 64 so that it may tion of the stroke of the piston. The device embe adjusted to position the rod 62 relative to the bodies a housing I3 to which a control handle erm 58.

I4 and a, cylinder I5 is secured. The cylinder As illustrated more particularly in Figs. 11, 12, 5 encompasses a Piston l5 having a piston rod I1 and 13, the anvil 51 is a, projection of a. cylin- M r h1 IM n www "I w M W WI of wires 86 which are to be secured together, are disposed within the groove of the guide element i8 or the device may be moved to have the groove placed over the junction of the wires at the point at which they are to be secured together. The trigger is then actuated to have the air or other duid pass from the conduit 28 to the top of the cylinder i 5. The pressure accumulating within the cylinder will force the piston i6 downwardly to move the slide IB downwardly therewith. V

` The downward movement of the slide actuates the arms 34 to engage the wire and bend it about the mandrel 51 which is disposed in a position as illustrated in Fig. l1. The grooves in the ends of the gripping jaws 12 of the arms will cause one arm of the wire to be Amoved frontwardly, while the other end is moved rearwardly to produce the twist in the resulting ring formed thereby. As the wire is substantially bent into the shape as illustrated in Fig. 14, the rod t2 will dii engage the arm 58 to cause the arm to move in a clockwise direction to retrieve mandrel iil which moves downwardly during the time it is being retrieved so as to move along with the arms 3d during such retrieving movement. Through this combined movement, the anvil is available to have the bending of the wire completed before it is withdrawn, since such withdrawal occurs during the synchronized downward movement of the anvil and the arms M.

Prior to the movement of the anvil the surface ll of the arms engages the cam surface'l of the element i3 to cause the arms to move inwardly to twist the wire about the anvil into the form as illustrated in Fig. 14. The anvil is retrieved in the manner above set forth and the arms 3d continue to move downwardly while retaining the ring until the ring i2 is disposed about the wires 86 at which time the cam surfaces 'll will engage the additional cam surfaces 'it on the element 'i3 to cause the arms to move inwardly to form the ring about the wires as illustrated more sepciiically in Figs. 15 and 16.

During the downward movement the cam db moves the carriage dii outwardly on the track 35 to have the fingers di thereof engage and clamp a new section of the wire idand to tension the spring d3. At the same time the cam surface til of the shearing' device di was engaged by the roller bfi to move the arm inwardly to eiect a shearing operation.

Aiter the clinching operation is completed, the

operation releases the handle 25 to permit the.

air in the cylinder to be released through the opening til so that the piston it may be retrieved by the spring 2t. The retrieving of the piston moves the slide it upwardly which permits the arms 3d to separate under the bias of the spring B2, moves the cam surface db upwardly out of engagement with the roller M, moves the rod 62 upwardly out of engagement with the arm 58, and moves the roller 5d upwardly out oi engagement with the cam surface 53 to permit the arm 5d to move the anvil back into operating position below the wire 3H which was cut on the down stroke and which is now supported on the pins lid. The shearing device 32 has the arm 5t thereof moved in counter-clockwise direction by the spring 56 out of the path of movementci the wire Sii which is immediately advanced by the forward movement of the carriage dt under the bias of the springs d3. The device is again in a condition to be actuated to form and clinch a section of wire cut during the described operation, about additional members 86 which are to be secured together.

The device thus constructed is simple yet positive in operation when forming a section of wire into U-shape and clinching the wire to members to be secured together all during the single stroke of the device. During the stroke an additional section of wire is sheared and disposed adjacent to the position in which it will be operated on when the device is next employed. The anvil is unique in that it moves downwardly along with the forming element during the time that it is retrieved so as to be out of position of the forming arm after the forming operation.. The simple and portable device thus formed not only eliminates the separate machine heretofore utilized for forming the rings but also the mandrel on which the rings were assembled and secured to theA tool which etlected the clinching operation.

Where the device is too heavy i'or an operator to readily handle, it may be suspended from an arm, bracket, or ceiling and through the movement of the work, 4the device or both, effect the engagement between the receiving element of the tool and the work prior to the operation of the device. r

While I have described and illustrated but a single embodiment of my invention, it will be apparent to those skilled in the art that various changes, omissions, additions, and substitutions may be made therein without departing from the spirit and scope of my invention, as set forth in the accompanying claims.

I claim as my invention:

1. A forming and clinching device including, in combination, a slide,4 means for reciprocating said slide, means for delivering wire to said device, means for shearing said wire, an anvil, arms for forming the wire about the anvil having means for deiiecting the ends in opposite directions, means for moving said anvil to and from the path of movement of said forming means, and means on said slide for operating said delivering, shearing, forming, and anvil moving means during one stroke of said slide to form a U-shaped staple with the ends of the legs thereof disposed out of the plane of each other and the base oi the staple.

2. d forming and clinching device embodying a slide, means for reciprocating said slide, means for delivering wire to said device, means for Ishearing said wire, an anvil, arms carried by said slide for forming the wire about said anvil having means for delecting the ends in opposite directions, means for moving said anvil to and from the path of 4movement of said forming means, and means for clinching said wire about elements to be secured after the anvil has been moved from said path, said delivering means, said shearing means, said forming means,'and said anvil moving means all being actuated by the movement of the slides in a single direction to form a U-shaped staple with the ends of the legs thereof disposed out of the plane of each other and the base of the staple, which legs overlap when clinched.

3. In a ring forming and clinching device including, in combination, arms for forming a section of wire about an anvil and for clinching the wire so formed about members to be secured together, an anvil, means for moving said anvil to and from the path of movement of said forming and clinching arms, cam means for actuating said arms to effect the forming operation, and additional cam means for actuating said arms to effect the clinching operation.

4. In a ring forming and clinching device including, in combination, arms for forming a section of wire about an anvil and for clinching the wire so formed about members to be secured together, an anvil, means for moving said anvil to and from the path of movement of said forming and clinching arms and for moving said anvil downwardly during the movement of said slide, and means for moving said arms toward each other about said anvil to bend said wire before the simultaneous movement of said anvil and arms.

5. In a ring forming and clnching device including, in combination, arms for forming a section of wire about an anvil and for clinching the wire so formed about members to be secured together, an anvil, means for moving said anvil to and from the path of movement of said forming and clinching arms, means o-n said arms for holding said wire and for deiiecting the ends thereof in opposite directions during the bending operation, means for operating said arms and said anvil duringa single stroke of said slide, and pressure actuated means for moving said slide.

6. In a forming and clinching device including, in combination, means for delivering wire to said device, means for shearing said wire, an anvil, means for forming the wire about said anvil, and

means for moving said anvil to and from the path of movement of said forming means and downwardly with said forming means after said forming operation.

'7. In a forming and clinching device including, in combination, means for delivering wire to said device, means for shearing said Wire, an anvil, means for forming the wire about said anvil, means for moving said anvil to and from the path of movement of said forming means and downwardly with said forming means, means for twisting the ends of said wire during the forming operation, and means for actuating said forming means to clinch said formed wireV about members to be secured together with the ends in overlapping relation.

8. In a ring forming and clinching device, including, in combination, means for forming and clinching a section of wire about members to be secured together, means for actuating said forming and clinching means, a wire delivering element embodying a. carriage movable to engage a new section of wire by said actuating means, a clamp for retaining the wire in position in the device, a clamp on said carriage for securing said wire, and means for moving said carriage to advance the Wire within the device, means for shearing a section of said wire, an anvil, arms engaging said wire for bending it about said anvil, means on said arms for deecting the ends of said wire in opposite direction when being bent, and means for further operating both of said arms toward each other to clinch said bent wire with the ends in overlapping relation.

' 9. In a' ring forming and clinching device including, in combination, means for forming and clinching a section of wire about elements to be secured together, an anvil about which the wire is formed, means for moving said forming means, means for moving said anvil out of the path of movement of said forming and clinching means lduring the time it is moving downwardly with said forming means, said means being actuated by said moving means, cam means operating said forming means toward each other to form the wire about said anvil, and additional cam means for moving both of said arms toward each other to clinch said formed wire.

10. In a ring forming and clinching device, including, in combination, an anvil, means for forming a wire about said anvil, means for moving said forming means toward and beyond the anvil, means for moving said anvil downwardly and rearwardly of said forming means during the time said forming means is moving downwardly therewith, and means for moving said forming means toward said anvil to form the wire thereabout, and additional means for moving said formed wire to produce a clinching operation L.

wth the ends overlapping.

11.- A ring forming and clinching device including, in combination, an anvil movable longitudinally and downwardly, means for moving said anvil, means for forming a wire about said anvil before it is moved, and means for moving said forming means and said anvil in synchronism.

STANLEY G. SMITH. 

